Is of a Wimpy fiction?

It seems you are asking about "Is of a Wimpy fiction?"

This phrase doesn't make grammatical sense, so it's hard to understand what you are asking.

Are you asking about something like:

* Is there a Wimpy fiction book?

* Is the "Diary of a Wimpy Kid" series a fiction?

* Is there a fictional character named Wimpy?

Please clarify your question so I can help you better!